Multiple-feed gear-pump.



W. A. FREDERICK.

MULTIPLE FEED GEAR PUMP. APPLICATION FILED APR.z9,191o.

974,783.. Y Patented Nov. 8, 1910.

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. feeding lubricating oil studs 7 that `WALTER. A. FREDERICK, OF MUSKEGON, MICHIGAN.

MULrIrLE-FEED GEaBfPUMP.

tain new and useful Improvements in Multiple-Feed Gear-Pumps; and I do hereby declare the following to be afull, clear, andexact description of the invention, such as will enable others skilled in the art to which it appertainsY to make and use the same.

My invention has for its object to provide a simplified and improved multiple feed gear pump especially adapted for 'use in engine, machine or coperating plate.

To the above ends, the invention consists of the novel devices and combination of devices hereinafter the claims.

In the accompanying drawings which illustrate the d icate like parts throughout the several views.

Referring to the drawings, Figure 1 is a plan view, with some parts broken away, showing the improved multiple feed gear pump; and Fig. 2 is a vertical section taken approximately on the line m2 m2 of Fig. 1, some parts being broken away.

The numeral 1 indicates a casting or body member provided, as shown, with a flat vertical face and formed adjacent to said face with a multiplicity .of intersecting gear seats 2. As shown, there are foniof these gear seats, but the number thereof may be increased at will. Working in the seats 2, with their teeth closely engaging the same, are gears 3 that intermesh and form a train. One of the lsaid. gears 3 is keyed or otherwise rigidly secured to the inner end of a driving shaft 4 that is journaled in a long sleeve-like hub 5 of the casting 1 and also works through a stuiiing box 6 on the end of the said hub. The other gears 3 are loosely journaled on project axially into the seats 2 from the back of the said casting 1. All of the seats 2 arenormall'y closed by a plate 8 described and defined in ,t secured to the casting 1, by screws 9, and

closely engaging the adjacent faces of the gears 3. The casting 1 is provided with oil admission ports 10 that are connected to a suitable source of oil supply, not shown, and open into the lower intersections of the outer seats 2 and the respective inner seats 2. The casting 1 is also formed with corre- Specification of Letters Patent. Application tiled April 29, 1910. Serial No. 558,391.

to the bearings of an invention, like characters inlgear pump, in accordance with tion of the intermediate r Patented Nov.. d, 1910.

spondiug discharge ports 11 that are connected to oil distributing pipes 12. The four gears constitute three independently operative gear pumps, to-wit, the intermeshing teeth of the outer and corresponding inner gears 3 afford two pumps whichdischarge oil independently through the pipes 12, and the intermeshing teeth of t-he two inner gears constitute the third pump which, because of the reverse direction of movement of the intermeshing teeth, is arranged to discharge oil through a lower port 13 that extends laterally in the casting 1 and thence upward to a third oil distributing (pipe 12a.

The oil for the three pumps is rawn in through the two ports l0 and part thereof is discharged through the ports 11 by the teeth of the outer gears, while a part of the oil is discharged, by the teeth of the two inner gears, through the port- 13 and thence through the distributing pipe 12".

It will thus be seen that the oil is positively and independently fed through the several oil delivery pipes, at a speed depending on the speed of the gears and which is proportional to the speed of the gears. It will also be noted that the very same gears which produce the pumping action serve to transmit the motion from the one driving shaft to all the gears. This, 4as is evident, gives a very simple construction and one which all of the gears of the pump are arranged to run in oil which is, of course, a highly desirable feature. Also, with the arrangement of the intersecting gear seats and intermeshin gears, each additional gear addedto the train produces another or' additional pump. The construction described is also of comparatively small cost. In actual practice, the eiiiciency of the pump has been demonstrated. To produce a multiple my invention, requires three or more iutermeshing gears' and a corresponding number of intersecting gear seats.

What I claim is:

1. In a multiple feed gear pump, a bod member having at least four intersecting gear seats and provided with admission ports leading to the inner section'of the outer and corresponding adjacent inner seats, and with discharge ports leading from the opposite sidesof the same seats, and provided further with an intermediate discharge port opening from the opposite point,- of intersecseats, 1n comb1nation with interineshing gears Working in said seats, and a driving shaft connected to one of said gears for imparting motion to the entire train of gears, substantially as described.

2. In a multiple feed gear pump,-a body member having at least four intersecting gear seats and provided with admission ports leading to the inner section of the outer and corresponding adjacent inner seats, and with discharge portsleading from the opposite sides of the same seats, and provided further with an intermediate discharge port opening from the opposite point of intersection of the intermediate seats, in combination With intermeshing gears Working in said seats, and a driving shaft connected to one of said gears for imparting motion to the entire train of gears, and the Said body member having a detachable plate which normally closes the said gear seats and closely engages the several. gears, substantially as described.

In testimony whereof I affix. my signature in presence of two witnesses.

IVALTER A. FREDERICK.v

Witnesses? R. W.' JUDsoN, G. 'W. YEOMAN. 

